System of networked controllers, and method of operating a system of networked controllers

1. A system of networked controllers, comprising: one or more switchable optical filters, wherein the switchable optical filters are photochromic and electrochromic; a master controller; and one or more slave controllers operably connected to the one or more switchable optical filters, wherein: at least one of the one or more slave controllers is communicatively coupled to the master controller; the master controller is configured to transmit a switching command to the at least one of the one or more slave controllers; and each slave controller is operable, in response to receiving the switching command, to cause a corresponding switchable optical filter to transition from a first state to a second state, and further comprising one or more of the following communicatively coupled to the master controller and/or at least one of the one or more slave controllers: a GPS receiver operable to generate a GPS signal; and a gyroscope operable to generate an orientation signal, wherein the master controller is further configured to determine whether to transmit the switching command based on one or more of the GPS signal, and the orientation signal.

2. The system of claim 1 , wherein the first state comprises a first colour and the second state comprises a second colour, or wherein the first state comprises a first amount of light transmittance and the second state comprises a second amount of light transmittance.

3. The system of claim 1 , wherein the switchable optical filters are configured to transition from a first state of relatively lower light transmittance to a second state of relatively higher light transmittance in response to application of a potential difference across the switchable optical filters, or wherein the switchable optical filters are configured to transition from a first state of relatively higher light transmittance to a second state of relatively lower light transmittance in response to light incident on the switchable optical filters.

4. The system of claim 1 , wherein: the switching command comprises an indication of a subset of the one or more slave controllers; and the master controller is further configured to transmit the switching command to each slave controller of the subset of the one or more slave controllers.

5. The system of claim 1 , wherein: the one or more slave controllers are associated with one or more geographic zones; the indication comprises at least one of the geographic zones; and the master controller is further configured to transmit the switching command to each slave controller associated with the at least one of the geographic zones.

6. The system of claim 1 , wherein each slave controller is further operable, in response to detecting a further switching command, to cease the corresponding switchable optical filter from transitioning from the first state to the second state.

7. The system of claim 1 , further comprising: one or more light sensors operable to generate one or more light readings and being communicatively coupled to the master controller and/or at least one of the one or more slave controllers, wherein the master controller is further configured to determine whether to transmit the switching command based on the one or more light readings.

8. The system of claim 1 , further comprising: one or more relay slave controllers communicatively coupled to the master controller, wherein: the master controller is further configured to transmit the switching command to the at one or more relay slave controllers; and the one or more relay slave controllers are configured, upon receiving the switching command, to relay the switching command to at least one of the one or more slave controllers.

9. The system of claim 1 , wherein the master controller is further configured to transmit the switching command to the at least one of the one or more slave controllers after a delay, the delay being based on one or more light sensor readings obtained from one or more light sensors associated with the master controller and/or at least one of the one or more slave controllers.

10. The system of claim 1 , further comprising: one or more current meters for measuring one or more currents in the networked system and being communicatively coupled to the master controller, wherein the master controller is further configured to determine whether to output, based on the one or more measured currents, an error signal indicative that one or more of the slave controllers have failed.

11. The system of claim 1 , wherein: the system is comprised in: a residence, a train, an aircraft, a gondola, or an automotive vehicle; and the switchable optical filters are provided in one or more windows of the residence, the train, the aircraft, the gondola, or the automotive vehicle.

12. A system of networked controllers, comprising: one or more switchable optical filters, wherein the switchable optical filters are photochromic and electrochromic; a master controller; and one or more slave controllers operably connected to the one or more switchable optical filters, wherein: at least one of the one or more slave controllers is communicatively coupled to the master controller; the master controller is configured to transmit a switching command to the at least one of the one or more slave controllers; and each slave controller is operable, in response to receiving the switching command, to cause a corresponding switchable optical filter to transition from a first state to a second state, and wherein: at least one of the one or more slave controllers is communicatively coupled to at least one other of the one or more slave controllers and is operable, in response to receiving a control signal, to transmit a switching command to the least one other of the one or more slave controllers.

13. A system of networked controllers, comprising: one or more switchable optical filters, wherein the switchable optical filters are photochromic and electrochromic; a master controller; and one or more slave controllers operably connected to the one or more switchable optical filters, wherein: at least one of the one or more slave controllers is communicatively coupled to the master controller; the master controller is configured to transmit a switching command to the at least one of the one or more slave controllers; and each slave controller is operable, in response to receiving the switching command, to cause a corresponding switchable optical filter to transition from a first state to a second state, and, wherein: the master controller is further configured to transmit a status request to the at least one of the one or more slave controllers; the at least one of the one or more slave controllers is further operable to transmit a status update to the master controller in response to receiving the status request; and the master controller is further configured to output an error signal indicative that the at least one of the one or more of the slave controllers has failed, if the master controller does not receive the status update or if the status update is determined to not meet a predetermined condition.

14. A system of networked controllers, comprising: one or more switchable optical filters, wherein the switchable optical filters are photochromic and electrochromic; a master controller; and one or more slave controllers operably connected to the one or more switchable optical filters, wherein: at least one of the one or more slave controllers is communicatively coupled to the master controller; the master controller is configured to transmit a switching command to the at least one of the one or more slave controllers; and each slave controller is operable, in response to receiving the switching command, to cause a corresponding switchable optical filter to transition from a first state to a second state, and further comprising: one or more light sensors operable to generate one or more light readings and being communicatively coupled to the master controller and/or at least one of the one or more slave controllers, wherein the master controller is further configured to determine whether to output, based on the one or more light readings, an error signal indicative that one or more of the slave controllers have failed.

15. A system of networked controllers, comprising: one or more switchable optical filters, wherein the switchable optical filters are photochromic and electrochromic; a master controller; and one or more slave controllers operably connected to the one or more switchable optical filters, wherein: at least one of the one or more slave controllers is communicatively coupled to the master controller; the master controller is configured to transmit a switching command to the at least one of the one or more slave controllers; and each slave controller is operable, in response to receiving the switching command, to cause a corresponding switchable optical filter to transition from a first state to a second state, and further comprising: one or more backup slave controllers communicatively coupled to the master controller and at least one of the one or more slave controllers, wherein the master controller is further configured to determine whether to transmit the switching command to the one or more backup slave controllers based on an error signal.

16. A system of networked controllers, comprising: one or more switchable optical filters, wherein the switchable optical filters are photochromic and electrochromic; a master controller; and one or more slave controllers operably connected to the one or more switchable optical filters, wherein: at least one of the one or more slave controllers is communicatively coupled to the master controller; the master controller is configured to transmit a switching command to the at least one of the one or more slave controllers; and each slave controller is operable, in response to receiving the switching command, to cause a corresponding switchable optical filter to transition from a first state to a second state, and further comprising one or more light sensors associated with the one or more slave controllers and being operable to generate one or more light readings, wherein a first one of the one or more slave controllers is configured to: compare a light reading of a first light sensor associated with the first slave controller with a light reading of a second light sensor associated with a second slave controller; and adjust the light reading of the first light sensor based on the comparison, and at least one of the one or more slave controllers is configured to cease applying voltage in response to at least one of the one or more currents being determined to be greater than a preset threshold.